LEDs on a String
Okay, so a friend and I got bored and decided to play with this idea. We attached a few leds to some thin string (we used dental floss), creating a pendulum. Then we turned off the lights, pointed a camera up, opened the shutter for about 25 seconds and released the led:
And then we tried making a double pendulum by adding a second, green, led.
Here’s our setup for the double pendulum. And remember, if you decide to try this, use a resistor in series with each led.